Swizzling UIImage.init(named:)在获取实例方法时返回nil

import UIKit

extension UIImage {
    static func swizzleInitNamed() {
        guard let originalSelector = #selector(UIImage.init(named:)),
              let swizzledSelector = #selector(swizzledInitNamed(named:)) else {
            return
        }
        
        let originalMethod = class_getClassMethod(UIImage.self, originalSelector)
        let swizzledMethod = class_getClassMethod(UIImage.self, swizzledSelector)
        
        if originalMethod != nil && swizzledMethod != nil {
            method_exchangeImplementations(originalMethod!, swizzledMethod!)
        }
    }
    
    @objc private static func swizzledInitNamed(named name: String?) -> UIImage? {
        // 自定义逻辑
        print("Swizzled init(named:) called with \(name ?? "")")
        return swizzledInitNamed(named: name)
    }
}

// 在 +load 方法中进行 Swizzling
+load {
    UIImage.swizzleInitNamed()
}